\(B\rho\) -defined isochronous mass spectrometry ( \(B\rho\) -IMS), established at a storage ring, is a valuable tool for determining the masses of short-lived nuclei. In previous \(B\rho\) -IMS experiments, the effects of magnetic field drifts had to be corrected to improve the mass resolving power of \(B\rho\) -IMS [Eur. Phys. J. A 59, 27 (2023)]. The correction procedures are complicated and require multiple reference ions with well-known masses in each injection, which may not be the case in the measurements of exotic nuclei with tiny production yields. In this study, we propose a novel approach to \(B\rho\) -IMS that requires only single reference ion for mass determination in an individual injection, avoiding tedious and complicated correction procedures. This approach achieves mass precision comparable to that of previous \(B\rho\) -IMS results and is proven to be suitable for future mass measurements of exotic nuclei with extremely low production yields.
